joshman123

ok besides heavy tell me about this engine!!

rc bugman

My Feedback: (30)

I happen to love the engine. It is a real work horse. I have a fleet of 12 research planes powered with this engine and after a few hundred hours of runtime, I have had no problems with the engines.

Hope this helps

Elson

ram3500-RCU

My Feedback: (221)

A little extra weight means more mass, which usually translates to greater longevity. I also like 3W. I have the 55, not the 50, but still very happy with it's power and operation.

cap10b

Josh,
Its a great little engine, a DA 50 has nothing on my 3W. while the DA likes to spin more than the 3W the Dubya can swing a bigger prop and pull just as hard. Had twin QQ 86" Yaks in the club one was mine with a 3W-50I the other was a DA50 and the only difference between the two was exaclty the 1.2 lbs weight difference between the two engines. Both planes climbed at the same rate both planes were just as fast as the other in level flight both planes could hover and pull out at the same speed. The only difference was the pilots. I like the DA 50 but for me I think the 3W will last longer and give great performance over the long haul.

Also got to fly a DL 50 and its a good lil motor, not as strong as the DA but good lil beginer motor.


Good Luck

JDS


Ps- Below is the same 3W-50I out of the crashed Yak and into a Zimpro 30% Cap 21

DaddySam

My Feedback: (9)

I have two and like them. The ignitions seem to be problematic, and I've had both repaired. I also have a RCxcell ignition from CH on one, and it runs fine too. I am putting mine in warbirds, so I actually want the extra weight, and I also believe that the weight translates into smooth running and beefier components. The engine will spin a bigger prop -- another plus for me. About the only other issue is making sure the carb block is sealed to the crankcase, with an anerobic gasket maker, and then not over torquing the block! I think it depends on your intended use. Me, I think I made the right choice for my application, and am happy. Also, I have found that the service I get from Bobby at Cactus Aviation has been great.
Sam

joshman123

thanx for the feedback, i bought 1 on rcu from mark c (great person to deal with) it is only been run on a test stand!!??? pics look good, i feel i got a good buy on it.. 510.00 with 2- 22/10 carbon fiber props,smoke muffler, mount, a spinner and the motor shipped! i liked the look of the 3w over the da. everyone at my field uses da. the motor looked like it may take a prop strike better than the da!!! not that i plan on crashing but.... it is going on my first gas trainer. a guy had a lightly damaged one and i about have it finished, its a wild hare extra 300 special.

cap10b

Josh,
I was gonna say Wild Hare, not that Tom is partial to 3W but because he mounts every motor he can get his hands on and flys his proto types with them just to see how his planes hold up. Without exception Zenoah is the standard he uses for his bench mark performance. So if a Zenoah will fly it a 3W in the same class will be ballistic. I ran mine at one time or another on the following propellers 3W 23X8, Bolly 23x8, Beila 23x8, all gave excellent 3D performance and good speed at 6000 rpm.

Good Luck

jds

Ps- Below is my QQ Yak 54 with the 3W-50I

EddieDean

My Feedback: (3)

I've just install a new 3W-50i in an Aeriworks Yak 54 and after two 5 minute flights I find fuel/oil on everything inside the plane. I've checked the tank and plumbing and everything seems good. Any ideas?

Dan767

My Feedback: (19)

Be sure the muffler is on tight. You will have a black oily residue from the exhaust until you've gone through five gallons of gas and switch to synthetic. Could you post a pic?

rc bugman

My Feedback: (30)

Are you running a velocity stack on the carb? The engine spits back a bit and a velocity stack helps a lot. Also, are you running it a bit rich? That also makes the problem worse. Another possibility is a chunk out of the reed valve which allow the blow back.

Elson

EddieDean

My Feedback: (3)

Thanks Dan737 and rc bugman. There is oily residue on the outside from the exhaust but not on the inside. The wet and oily inside is unburnt and clear. This new engine did not come with a velocity stack. It is being run a bit rich and I knew the carb could spit a bit but I did not expect this much. I've never had this much before with any other engines (3W's and others) I've ran. I put a balsa sheet between the engine box and the interior to keep it out of the plane and the balsa sheet was soaked after a 5 minute run. The balsa wall also caused the engine to run a bit richer. It is probably less than an inch from the intake of the carb, so I don't think I can leave it there. Sorry, I don't have any photos. I've found the two nylon locknuts holding the carb on were not very tight (snug but not tight). I turned the nuts but they did not get tighter. I have ordered new screw posts and nuts. I hope that fixes the problem but can't believe the carb is that loose. I bought the engine new at Toledo about 3 years ago but have not run it until now and I hope there is not a chunk out of the reed value! Another clue that may help is when I come back to idle from wide open throttle the engine takes about 30 seconds or more to come down from a very fast idle to the idle it is set for. It seems to idle just fine once it finally slows down and it goes back to wide open without much hesitation. I'm using Lawnboy Ashless mixed 50:1 with 87 octane. I haven't tocuhed the needle values as the engine started easily and turning a 22x8 prop at 6400 rpm.

rc bugman

My Feedback: (30)

eddie dean,

Lean the engine so it transitions well and the spit back will decrease a lot. If you use a higher octane gas, you will see an increase of rpms. 3W calls for at least 89 octane and I run 91-93 octane. You should see a 2-300 increase in rpms with the higher octane. Also, by leaning the mixture you should see an increase. With a 22 x 8, your rpms should be in the 6800+ range depending of the prop.

Elson

EddieDean

My Feedback: (3)

Thanks alot. I'll try again after I replace the carb mounting post and nylon locknuts.